86 2.5l Cutlass Ciera Cutting out--Please help
SmokinU
04-14-2004, 01:47 PM
Hey everyone...first Id like to say hello to everyone on the forum. I need help on my latest car problem. :)
I have a 2.5L 86 Ciera that is cutting out on me. THe reson its dieing is casue the Throttle body injector is not firing. If the engine has been sitting for a while the TBI will spray and start right up. But it'll run with an erratic idle and will increase and decrease RPMs repetedly. Then a few min later the TBI will shut down and kill the engine. The injector is good itself.
My guess is the ECU is telling the injector not to open. Im suspecting the ECU. I just changed out the TPS and the fuel pressure is good. If its not the ECU, what sensor tells the computer the rpms of the engine? Im also guessing that the ECU thinks the engine has 0 rpms and then shuts down the fuel. If it sits for another 30 min, you can start it up again and it'll do it all over.
Please let me know what you think. I cant figure this one out. Thank you. ERIC
I have a 2.5L 86 Ciera that is cutting out on me. THe reson its dieing is casue the Throttle body injector is not firing. If the engine has been sitting for a while the TBI will spray and start right up. But it'll run with an erratic idle and will increase and decrease RPMs repetedly. Then a few min later the TBI will shut down and kill the engine. The injector is good itself.
My guess is the ECU is telling the injector not to open. Im suspecting the ECU. I just changed out the TPS and the fuel pressure is good. If its not the ECU, what sensor tells the computer the rpms of the engine? Im also guessing that the ECU thinks the engine has 0 rpms and then shuts down the fuel. If it sits for another 30 min, you can start it up again and it'll do it all over.
Please let me know what you think. I cant figure this one out. Thank you. ERIC
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